研究目的
Design, simulation, and construction of a switching mode power supply for a photovoltaic panel with 24 V output voltage and 250 W peak power, based on a flyback topology with a nontraditional passive non-dissipative snubber circuit.
研究成果
The converter for the photovoltaic panel was successfully developed and tested, showing a maximum efficiency of 94.5% at 250 W output power. The design and simulation approach, including the use of a nontraditional snubber circuit, provides a foundation for further research and development in power electronics for renewable energy applications.
研究不足
The converter showed a problem with fast changes in input voltage under laboratory conditions, which is unlikely to occur with a real photovoltaic panel. This is due to the slow voltage PI compensator designed to control without voltage overshoot.
1：Experimental Design and Method Selection:
The design is based on a flyback topology with a nontraditional passive non-dissipative snubber circuit. The converter was simulated in MATLAB Simulink and is fully digitally controlled by a STM32F334 microcontroller with a cascade control loop.
2：Sample Selection and Data Sources:
The power supply is intended for one photovoltaic panel with specific output characteristics.
3：List of Experimental Equipment and Materials:
STM32F334 microcontroller, MATLAB Simulink for simulation, photovoltaic panel with 24 V output voltage and 250 W peak power.
4：Experimental Procedures and Operational Workflow:
The converter was simulated before prototyping. A two-layer printed circuit board was designed post-simulation, with careful placement of control and power parts to minimize interference.
5：Data Analysis Methods:
The behavior of the converter was analyzed through simulation and practical testing, including efficiency measurements and waveform analysis.
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